Quantification of passivation layer growth in inert anodes for molten salt electrochemistry by in situ energy-dispersive diffraction
An in situ energy-dispersive X-ray diffraction experiment was undertaken on operational titanium electrowinning cells to observe the formation of rutile (TiO2) passivation layers on Magnéli-phase (TinO2n-1; n = 4-6) anodes and thus determine the relationship between passivation layer formation and e...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
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IUCr Journals
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/25298 |
| _version_ | 1848751669823668224 |
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| author | Rowles, Matthew Styles, M. Madsen, I. Scarlett, N. McGregor, K. Riley, D. Snook, G. Urban, A. Connolley, T. Reinhard, C. |
| author_facet | Rowles, Matthew Styles, M. Madsen, I. Scarlett, N. McGregor, K. Riley, D. Snook, G. Urban, A. Connolley, T. Reinhard, C. |
| author_sort | Rowles, Matthew |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | An in situ energy-dispersive X-ray diffraction experiment was undertaken on operational titanium electrowinning cells to observe the formation of rutile (TiO2) passivation layers on Magnéli-phase (TinO2n-1; n = 4-6) anodes and thus determine the relationship between passivation layer formation and electrolysis time. Quantitative phase analysis of the energy-dispersive data was undertaken using a crystal-structure-based Rietveld refinement. Layer formation was successfully observed and it was found that the rate of increase in layer thickness decreased with time, rather than remaining constant as observed in previous studies. The limiting step in rutile formation is thought to be the rate of solid-state diffusion of oxygen within the anode structure. |
| first_indexed | 2025-11-14T07:56:24Z |
| format | Journal Article |
| id | curtin-20.500.11937-25298 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:56:24Z |
| publishDate | 2012 |
| publisher | IUCr Journals |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-252982018-10-01T01:56:37Z Quantification of passivation layer growth in inert anodes for molten salt electrochemistry by in situ energy-dispersive diffraction Rowles, Matthew Styles, M. Madsen, I. Scarlett, N. McGregor, K. Riley, D. Snook, G. Urban, A. Connolley, T. Reinhard, C. in situ energy-dispersive diffraction electrolysis Rietveld refinement An in situ energy-dispersive X-ray diffraction experiment was undertaken on operational titanium electrowinning cells to observe the formation of rutile (TiO2) passivation layers on Magnéli-phase (TinO2n-1; n = 4-6) anodes and thus determine the relationship between passivation layer formation and electrolysis time. Quantitative phase analysis of the energy-dispersive data was undertaken using a crystal-structure-based Rietveld refinement. Layer formation was successfully observed and it was found that the rate of increase in layer thickness decreased with time, rather than remaining constant as observed in previous studies. The limiting step in rutile formation is thought to be the rate of solid-state diffusion of oxygen within the anode structure. 2012 Journal Article http://hdl.handle.net/20.500.11937/25298 10.1107/S0021889811044104 IUCr Journals fulltext |
| spellingShingle | in situ energy-dispersive diffraction electrolysis Rietveld refinement Rowles, Matthew Styles, M. Madsen, I. Scarlett, N. McGregor, K. Riley, D. Snook, G. Urban, A. Connolley, T. Reinhard, C. Quantification of passivation layer growth in inert anodes for molten salt electrochemistry by in situ energy-dispersive diffraction |
| title | Quantification of passivation layer growth in inert anodes for molten salt electrochemistry by in situ energy-dispersive diffraction |
| title_full | Quantification of passivation layer growth in inert anodes for molten salt electrochemistry by in situ energy-dispersive diffraction |
| title_fullStr | Quantification of passivation layer growth in inert anodes for molten salt electrochemistry by in situ energy-dispersive diffraction |
| title_full_unstemmed | Quantification of passivation layer growth in inert anodes for molten salt electrochemistry by in situ energy-dispersive diffraction |
| title_short | Quantification of passivation layer growth in inert anodes for molten salt electrochemistry by in situ energy-dispersive diffraction |
| title_sort | quantification of passivation layer growth in inert anodes for molten salt electrochemistry by in situ energy-dispersive diffraction |
| topic | in situ energy-dispersive diffraction electrolysis Rietveld refinement |
| url | http://hdl.handle.net/20.500.11937/25298 |